6 Aralık 2024 Dergi makalesi Açık Erişim

CERN İşbirliği

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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>CERN İşbirliği</dc:creator>
  <dc:date>2024-12-06</dc:date>
  <dc:description>A search is reported for charge-parity     $\mathrm{CP}$   violation in     ${\text{D}}^{0}\to {\text{K}}_{\text{S}}^{0}{\text{K}}_{\text{S}}^{0}$   decays, using data collected in proton–proton collisions at     $\sqrt{s}=13\phantom{\rule{0.166667em}{0ex}}\text{Te}\phantom{\rule{-0.80002pt}{0ex}}\text{V}$   recorded by the CMS experiment in 2018. The analysis uses a dedicated data set that corresponds to an integrated luminosity of 41.6    $\phantom{\rule{0.166667em}{0ex}}{\text{fb}}^{-1}$  , which consists of about 10 billion events containing a pair of b hadrons, nearly all of which decay to charm hadrons. The flavor of the neutral D meson is determined by the pion charge in the reconstructed decays     $\text{D}_{}^{\ast +}\to {\text{D}}^{0}{\pi }^{+}$   and     $\text{D}_{}^{\ast -}\to {\overline{\text{D}}}^{0}{\pi }^{-}$  . The     $\mathrm{CP}$   asymmetry in     ${\text{D}}^{0}\to {\text{K}}_{\text{S}}^{0}{\text{K}}_{\text{S}}^{0}$   is measured to be     ${A}_{\mathrm{CP}}\left({\text{K}}_{\text{S}}^{0}{\text{K}}_{\text{S}}^{0}\right)=\left(6.2±3.0±0.2±0.8\right)%$  , where the three uncertainties represent the statistical uncertainty, the systematic uncertainty, and the uncertainty in the measurement of the     $\mathrm{CP}$   asymmetry in the     ${\text{D}}^{0}\to {\text{K}}_{\text{S}}^{0}{\pi }^{+}{\pi }^{-}$   decay. This is the first     $\mathrm{CP}$   asymmetry measurement by CMS in the charm sector as well as the first to utilize a fully hadronic final state.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/274533</dc:identifier>
  <dc:identifier>oai:aperta.ulakbim.gov.tr:274533</dc:identifier>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>http://www.opendefinition.org/licenses/cc-by</dc:rights>
  <dc:source>European Physical Journal C 84(12)</dc:source>
  <dc:title>Search for CP violation in     ${\text{D}}^{0}\to {\text{K}}_{\text{S}}^{0}{\text{K}}_{\text{S}}^{0}$   decays in proton–proton collisions at     $\sqrt{s}=13\phantom{\rule{0.166667em}{0ex}}\text{Te}\phantom{\rule{-0.80002pt}{0ex}}\text{V}$</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
</oai_dc:dc>